"The multiplier effect that these agreements have on tax compliance cannot be underestimated," said Chief Richard Weber of IRS-Criminal Investigation (CI).

"The magnitude of the data provided by each of these agreements leads us to: more & more Banks, more Countries and more Individuals.

IRS-CI will continue to use all of the information we gather from these agreements to vigorously pursue individual U.S. taxpayers who illegally conceal assets offshore and to develop innovative strategies to combat international tax evasion worldwide."

The IRS keeps updating its list of foreign banks where the holders of these offshore accounts are subject to a 50% (rather than 27.5%) penalty in the IRS’s Offshore Voluntary Disclosure Program (OVDP). This penalty is based on the highest account balance measured over up to eight years.

Outside of these banks, the norm within the OVDP remains 27.5%. That is far better than prosecution or much bigger civil penalties. Some taxpayers can opt for the easier and less costly Streamlined program. This list does not impact the Streamlined programs because you must be non-willful to qualify. All of this is part of the June 2014 improvements to the OVDP, which sparked new interest in cleaning up offshore accounts.

With roughly 96 Swiss banks taking the DOJ deal and FATCA requiring the entire world to report to the IRS resulting in increasing disclosures, everyone American is eventually going to be discovered.

Banks worldwide want to know if there US clients are compliant with the IRS.

Within the OVDP, people who pre-cleared before the various effective dates are generally safe from the higher 50% penalty. As additional banks are added to the list, only those American taxpayers that request pre-clearance before their bank is listed, will get the 27 1/2% OVDP penalty. The 50% penalty now applies to all taxpayers with accounts at financial institutions or with facilitators which are named, are cooperating or are identified in a court filing such as a John Doe summons.

Although the 50% penalty is high, willful civil violations can result in tax, penalties and interest totaling 325% of the highest balance in the account for the most recent six years period. Recent guidance suggests that the IRS could be more lenient in the future, but the IRS’s definition of leniency can still make the OVDP a very good deal that provides certainty.